Green Roofs for Stormwater Runoff Control

Publication Type:
White Paper

Published / Updated:

Urban development has led to large areas of impervious surfaces such as parking lots and building roofs, and runoff from these areas is causing problems for many urban and suburban communities.

Green roofs have been suggested as a means to reduce the stormwater impact and test results indicate that green roofs are capable of removing 50% of the annual rainfall volume from a roof through retention and evapotranspiration.

The use of green roofs as an counter balance to storm water runnoff is not just theoretical as the practice is widespread in Germany and has been promoted in many German cities through financial incentives.

The purpose of this study was to quantify runoff reductions resulting from the use of extensive green roof systems. Download this white paper to learn about:

  • The construction of a green roof
  • Stormwater runnoff from green roofs
  • Runoff water quality from green roofs
  • Evaporation and evapotranspiration rates of green roofs
  • Green roof establishment and maintenance

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